In practice none of this is happening. All the major wallets query OpenSea to determine what NFTs an account has (according to the article). anyone can access the data but that doesn't change what the wallets query. I can start my own wallet that directly calculates who owns what using the blockchain, but that sounds computationally expensive and there's no guarantee that anyone would use it.
"In theory" the data is open. but I believe that the point of the article is that unless I'm running my own node, data visibility is limited to what someone else tells me. and here, in reality, OpenSea has decided to delist the author's NFT and they have no recourse.
"In theory" the data is open. but I believe that the point of the article is that unless I'm running my own node, data visibility is limited to what someone else tells me. and here, in reality, OpenSea has decided to delist the author's NFT and they have no recourse.